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United States weather

Weather in Des Moines, Iowa for September 2025

Your guide to Des Moines weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Des Moines has been significantly cooler than historical averages by -5.3 °F, with average temperature of 23.7 °F.

  • The forecast for the upcoming days in Des Moines predicts a temperature of 30.6 °F, which is slightly above the historical average.

  • In general, the average temperature in Des Moines at the beginning of September is 28.1 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 31 °F by the end of September.

    • Rain 🌧️

  • Des Moines experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 71.3 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/14°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
57 %
Avg humidity

Des Moines Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
29°
2
Sunny
30°
3
Sunny
29°
4
Mist
30°
5
Thundery outbreaks possible
31°
6
Overcast
24°
7
Sunny
24°
8
Cloudy
28°
9
Partly cloudy
31°
10
Overcast
30°
11
Heavy rain
30°
12
Sunny
32°
13
Partly cloudy
28°
14
Partly cloudy
36°
15
Partly cloudy
35°
16
Thundery outbreaks possible
34°
17
Patchy rain possible
30°
18
Patchy rain possible
30°
19
Moderate rain
30°
20
Patchy rain possible
27°
21
Partly cloudy
23°
22
Sunny
24°
23
Sunny
31°
24
Sunny
29°
25
Sunny
34°
26
Sunny
35°
27
Fog
26°
28
Mist
29°
29
Partly cloudy
32°
30
Patchy light rain with thunder
32°

Temperatures trend during September in Des Moines

See the weather trend as well as the moving average line

September weather in Des Moines day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 29° /13° 0 mm 7
Sept. 2 Sunny
Sunny
 30° /12° 0 mm 7
Sept. 3 Sunny
Sunny
 29° /13° 22.2 mm 7
Sept. 4 Mist
Mist
 30° /13° 0 mm 7
Sept. 5 Thundery outbreaks possible
Thundery outbreaks possible
 31° /17° 0.5 mm 7
Sept. 6 Overcast
Overcast
 24° /11° 0 mm 6
Sept. 7 Sunny
Sunny
 24° /7° 0 mm 6
Sept. 8 Cloudy
Cloudy
 28° /10° 0 mm 7
Sept. 9 Partly cloudy
Partly cloudy
 31° /12° 0 mm 8
Sept. 10 Overcast
Overcast
 30° /16° 0.4 mm 7
Sept. 11 Heavy rain
Heavy rain
 30° /16° 9 mm 7
Sept. 12 Sunny
Sunny
 32° /14° 0 mm 7
Sept. 13 Partly cloudy
Partly cloudy
 28° /14° 0 mm 7
Sept. 14 Partly cloudy
Partly cloudy
 36° /21° 0 mm 1.2
Sept. 15 Partly cloudy
Partly cloudy
 35° /21° 0 mm 1.3
Sept. 16 Thundery outbreaks possible
Thundery outbreaks possible
 34° /20° 0.1 mm 1.3
Sept. 17 Patchy rain possible
Patchy rain possible
 30° /17° 4 mm 1.1
Sept. 18 Patchy rain possible
Patchy rain possible
 30° /16° 0.4 mm 0
Sept. 19 Moderate rain
Moderate rain
 30° /15° 6.1 mm 5
Sept. 20 Patchy rain possible
Patchy rain possible
 27° /14° 0.2 mm 4
Sept. 21 Partly cloudy
Partly cloudy
 23° /11° 0 mm 5
Sept. 22 Sunny
Sunny
 24° /12° 0 mm 5
Sept. 23 Sunny
Sunny
 31° /11° 0 mm 5
Sept. 24 Sunny
Sunny
 29° /16° 0 mm 6
Sept. 25 Sunny
Sunny
 34° /14° 0 mm 6
Sept. 26 Sunny
Sunny
 35° /23° 0 mm 7
Sept. 27 Fog
Fog
 26° /12° 0 mm 6
Sept. 28 Mist
Mist
 29° /13° 0 mm 6
Sept. 29 Partly cloudy
Partly cloudy
 32° /14° 0 mm 8
Sept. 30 Patchy light rain with thunder
Patchy light rain with thunder
 32° /15° 2 mm 7
Next
Important Notice
Our weather forecast for Des Moines in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Des Moines forecast closer to your planned date for the most up-to-date weather information.
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Des Moines in September - FAQ

What are the expected maximum and minimum temperatures in Des Moines during September?
Enjoy moderate daytime temperatures of up to 29° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Des Moines during September?
Moderate rainfall is anticipated in Des Moines during September, with a total of 71.3 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Des Moines during September?
The average wind speed in Des Moines during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Des Moines

Explore the daily rainfall trends and prepare for Des Moiness September weather 💧

UV exposure in Des Moines during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Des Moines?

Get accurate weather forecasts for Des Moines, located at latitude 41.601 and longitude -93.609. Stay updated with localized weather information tailored for Des Moines.

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